Replacement stone for setting advice

[lavalle218]

I am looking for a stone for my old engagement setting - previous stone was a 1.3 carat round diamond so approx. 7mm diameter. Will I only be able to use a round in it or can I do something like a cushion? If I can select another shape, what dimensions would fit? Sorry if this is a dumb question but I’ve never tried this and don’t know how much wiggle room there would be.

 

[tyty333]

Pictures of your old setting would be especially helpful...how many prongs, prong layout, peg head, etc.

 

[lavalle218]

Here is a pic!

 

[tyty333]

side view of head needed

 

[lavalle218]

side view of head needed

Ah, sorry, will have to wait until it comes back to get that! Thanks